9722172222 has 144 divisors (see below), whose sum is σ = 25528932000. Its totient is φ = 2662934400.

The previous prime is 9722172203. The next prime is 9722172259. The reversal of 9722172222 is 2222712279.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3809847 + ... + 3812397.

It is an arithmetic number, because the mean of its divisors is an integer number (177284250).

Almost surely, 2^9722172222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9722172222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12764466000).

9722172222 is an abundant number, since it is smaller than the sum of its proper divisors (15806759778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9722172222 is a wasteful number, since it uses less digits than its factorization.

9722172222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2751 (or 2741 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 9722172222 is about 98601.0761705977. The cubic root of 9722172222 is about 2134.2949494923.

The spelling of 9722172222 in words is "nine billion, seven hundred twenty-two million, one hundred seventy-two thousand, two hundred twenty-two".